title: Fibroma of the tendon sheath of the long head of the biceps tendon.
abstract: Fibroma of the tendon sheath is a benign tumor that is less common than giant cell tumor of the tendon sheath. Both tumors may present as a painless, slowly enlarging mass. Radiological findings may be similar for both tumors. Histologically, fibroma of the tendon sheath lacks the hemosiderin-laden macrophages that are typical for giant cell tumor of the tendon sheath. We report on a 49-year-old woman with fibroma of the tendon sheath of the long head of the biceps tendon. In our case, on MR images, we observed band-like hypointense areas centrally in the tumor, mild patchy contrast enhancement, and most importantly, no decrease of signal intensity on gradient echo images. These characteristics reflected histological findings.
authors.affiliation: Department of Radiology, Universitair Ziekenhuis Brussel, Brussels, Belgium, michel.demaeseneer@uzbrussel.be.
authors.forename: Michel
authors.initials: M
authors.lastname: De Maeseneer
authors.forename: Tom
authors.initials: T
authors.lastname: Van Isacker
authors.forename: Leon
authors.initials: L
authors.lastname: Lenchik
authors.forename: Marie-Astrid
authors.initials: MA
authors.lastname: Van Caillie
authors.forename: Maryam
authors.initials: M
authors.lastname: Shahabpour
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D005350:Fibroma / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008875:Middle Aged; D012983:Soft Tissue Neoplasms / Q000473:pathology*; D013710:Tendons / Q000473:pathology*